Does anyone have knowledge about whether or not those 500 meter tall buildings have demolition charges built-in when they go up so they can be properly demolished when the need arises? Maybe that could be a requirement by insurance companies. Like: how else are you going to get them down again. Maybe those charges could have been set off by the jet fuel.

Is it true that jetfuel burns at 850 F max and steel melts at 1500F?

This is not a political statement, our democracy should allow it....
put fear aside, the next life you save may be your own.